grid

Add Grid to a Plot

grid adds an nx by ny rectangular grid to an existing plot.

Keywords
aplot
Usage
grid(nx = NULL, ny = nx, col = "lightgray", lty = "dotted",
     lwd = par("lwd"), equilogs = TRUE)
Arguments
nx, ny

number of cells of the grid in x and y direction. When NULL, as per default, the grid aligns with the tick marks on the corresponding default axis (i.e., tickmarks as computed by axTicks). When NA, no grid lines are drawn in the corresponding direction.

col

character or (integer) numeric; color of the grid lines.

lty

character or (integer) numeric; line type of the grid lines.

lwd

non-negative numeric giving line width of the grid lines.

equilogs

logical, only used when log coordinates and alignment with the axis tick marks are active. Setting equilogs = FALSE in that case gives non equidistant tick aligned grid lines.

Note

If more fine tuning is required, use abline(h = ., v = .) directly.

References

Murrell, P. (2005) R Graphics. Chapman & Hall/CRC Press.

See Also

plot, abline, lines, points.

Aliases
  • grid
Examples
library(graphics) # NOT RUN { plot(1:3) grid(NA, 5, lwd = 2) # grid only in y-direction ## maybe change the desired number of tick marks: par(lab = c(mx, my, 7)) op <- par(mfcol = 1:2) with(iris, { plot(Sepal.Length, Sepal.Width, col = as.integer(Species), xlim = c(4, 8), ylim = c(2, 4.5), panel.first = grid(), main = "with(iris, plot(...., panel.first = grid(), ..) )") plot(Sepal.Length, Sepal.Width, col = as.integer(Species), panel.first = grid(3, lty = 1, lwd = 2), main = "... panel.first = grid(3, lty = 1, lwd = 2), ..") } ) par(op) # }
Documentation reproduced from package graphics, version 3.6.1, License: Part of R 3.6.1

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